diff options
| author | Gavin Shan <gwshan@linux.vnet.ibm.com> | 2017-02-16 10:22:32 +1100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-03-15 10:02:45 +0800 |
| commit | 4ee3508f7abece538c4a99c71d81e94f8df44d97 (patch) | |
| tree | bb82f824c41b37874abef7d5e1757ee47911dec6 /drivers/pci | |
| parent | 5da90d0018a7f9ed23698663d046146426991ffa (diff) | |
pci/hotplug/pnv-php: Remove WARN_ON() in pnv_php_put_slot()
commit 36c7c9da40c408a71e5e6bfe12e57dcf549a296d upstream.
The WARN_ON() causes unnecessary backtrace when putting the parent
slot, which is likely to be NULL.
WARNING: CPU: 2 PID: 1071 at drivers/pci/hotplug/pnv_php.c:85 \
pnv_php_release+0xcc/0x150 [pnv_php]
:
Call Trace:
[c0000003bc007c10] [d00000000ad613c4] pnv_php_release+0x144/0x150 [pnv_php]
[c0000003bc007c40] [c0000000006641d8] pci_hp_deregister+0x238/0x330
[c0000003bc007cd0] [d00000000ad61440] pnv_php_unregister_one+0x70/0xa0 [pnv_php]
[c0000003bc007d10] [d00000000ad614c0] pnv_php_unregister+0x50/0x80 [pnv_php]
[c0000003bc007d40] [d00000000ad61e84] pnv_php_exit+0x50/0xcb4 [pnv_php]
[c0000003bc007d70] [c00000000019499c] SyS_delete_module+0x1fc/0x2a0
[c0000003bc007e30] [c00000000000b184] system_call+0x38/0xe0
Fixes: 66725152fb9f ("PCI/hotplug: PowerPC PowerNV PCI hotplug driver")
Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Reviewed-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
Tested-by: Vaibhav Jain <vaibhav@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/hotplug/pnv_php.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/pci/hotplug/pnv_php.c b/drivers/pci/hotplug/pnv_php.c index acb2be0c8c2c..f96588a8f29b 100644 --- a/drivers/pci/hotplug/pnv_php.c +++ b/drivers/pci/hotplug/pnv_php.c @@ -82,7 +82,7 @@ static void pnv_php_free_slot(struct kref *kref) static inline void pnv_php_put_slot(struct pnv_php_slot *php_slot) { - if (WARN_ON(!php_slot)) + if (!php_slot) return; kref_put(&php_slot->kref, pnv_php_free_slot); |